Two-photon absorption with tightly focused optical vortices

Kayn Forbes; Dale Green

doi:10.1117/12.2605922

Two-photon absorption with tightly focused optical vortices

Kayn Forbes, Dale Green

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

Unlike single photon absorption, the rate of multiphoton absorption processes is dependent on the polarization state of the exciting optical field. Multiphoton absorption spectroscopy is predominantly carried out with an exciting light source which is structured and polarized in a 2D sense in the transverse (x,y) plane, but homogeneous along the direction of propagation (z). Here we study two-photon absorption (TPA) with tightly focused optical vortices, where the spatial confinement generates significant longitudinal components of the electromagnetic fields in the direction of propagation, producing a 3D structured optical field at the focal plane. We discover that the additional polarization degree of freedom in the z direction for 3D structured light produces novel results in TPA compared to the preceding paraxial source excitation.

Original language	English
Title of host publication	Complex Light and Optical Forces XVI
Editors	David L. Andrews, Enrique J. Galvez, Halina Rubinsztein-Dunlop
Place of Publication	San Francisco, California, United States
Publisher	SPIE Press
Volume	XVI
ISBN (Electronic)	9781510649057
DOIs	https://doi.org/10.1117/12.2605922
Publication status	Published - 2 Mar 2022

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	12017
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Keywords

Structured light
multiphoton absorption
nonlinear optics
nonlinear spectroscopy
optical spectroscopy
optical vortex

Access to Document

10.1117/12.2605922

Published manuscriptFinal published version, 1.16 MBLicence: CC BY-NC

Cite this

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title = "Two-photon absorption with tightly focused optical vortices",

abstract = "Unlike single photon absorption, the rate of multiphoton absorption processes is dependent on the polarization state of the exciting optical field. Multiphoton absorption spectroscopy is predominantly carried out with an exciting light source which is structured and polarized in a 2D sense in the transverse (x,y) plane, but homogeneous along the direction of propagation (z). Here we study two-photon absorption (TPA) with tightly focused optical vortices, where the spatial confinement generates significant longitudinal components of the electromagnetic fields in the direction of propagation, producing a 3D structured optical field at the focal plane. We discover that the additional polarization degree of freedom in the z direction for 3D structured light produces novel results in TPA compared to the preceding paraxial source excitation.",

keywords = "Structured light, multiphoton absorption, nonlinear optics, nonlinear spectroscopy, optical spectroscopy, optical vortex",

author = "Kayn Forbes and Dale Green",

note = "Funding Information: KAF thanks the Leverhulme Trust for funding him through a Leverhulme Early Career Fellowship ECF-2019-398.",

year = "2022",

month = mar,

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language = "English",

volume = "XVI",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE Press",

editor = "Andrews, {David L.} and Galvez, {Enrique J.} and Halina Rubinsztein-Dunlop",

booktitle = "Complex Light and Optical Forces XVI",

}

Forbes, K & Green, D 2022, Two-photon absorption with tightly focused optical vortices. in DL Andrews, EJ Galvez & H Rubinsztein-Dunlop (eds), Complex Light and Optical Forces XVI. vol. XVI, 1201706, Proceedings of SPIE - The International Society for Optical Engineering, vol. 12017, SPIE Press, San Francisco, California, United States. https://doi.org/10.1117/12.2605922

Two-photon absorption with tightly focused optical vortices. / Forbes, Kayn ; Green, Dale.

Complex Light and Optical Forces XVI. ed. / David L. Andrews; Enrique J. Galvez; Halina Rubinsztein-Dunlop. Vol. XVI San Francisco, California, United States : SPIE Press, 2022. 1201706 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 12017).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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T1 - Two-photon absorption with tightly focused optical vortices

AU - Forbes, Kayn

AU - Green, Dale

N1 - Funding Information: KAF thanks the Leverhulme Trust for funding him through a Leverhulme Early Career Fellowship ECF-2019-398.

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Y1 - 2022/3/2

N2 - Unlike single photon absorption, the rate of multiphoton absorption processes is dependent on the polarization state of the exciting optical field. Multiphoton absorption spectroscopy is predominantly carried out with an exciting light source which is structured and polarized in a 2D sense in the transverse (x,y) plane, but homogeneous along the direction of propagation (z). Here we study two-photon absorption (TPA) with tightly focused optical vortices, where the spatial confinement generates significant longitudinal components of the electromagnetic fields in the direction of propagation, producing a 3D structured optical field at the focal plane. We discover that the additional polarization degree of freedom in the z direction for 3D structured light produces novel results in TPA compared to the preceding paraxial source excitation.

AB - Unlike single photon absorption, the rate of multiphoton absorption processes is dependent on the polarization state of the exciting optical field. Multiphoton absorption spectroscopy is predominantly carried out with an exciting light source which is structured and polarized in a 2D sense in the transverse (x,y) plane, but homogeneous along the direction of propagation (z). Here we study two-photon absorption (TPA) with tightly focused optical vortices, where the spatial confinement generates significant longitudinal components of the electromagnetic fields in the direction of propagation, producing a 3D structured optical field at the focal plane. We discover that the additional polarization degree of freedom in the z direction for 3D structured light produces novel results in TPA compared to the preceding paraxial source excitation.

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KW - multiphoton absorption

KW - nonlinear optics

KW - nonlinear spectroscopy

KW - optical spectroscopy

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DO - 10.1117/12.2605922

M3 - Conference contribution

VL - XVI

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Complex Light and Optical Forces XVI

A2 - Andrews, David L.

A2 - Galvez, Enrique J.

A2 - Rubinsztein-Dunlop, Halina

PB - SPIE Press

CY - San Francisco, California, United States

ER -

Two-photon absorption with tightly focused optical vortices

Abstract

Publication series

Keywords

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Quantum theory for advanced molecular photonics: structured light and plasmonics

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Two-photon absorption with tightly focused optical vortices

Abstract

Publication series

Keywords

Access to Document

Other files and links

Projects

Quantum theory for advanced molecular photonics: structured light and plasmonics

Cite this